CUMMINS
CUMMINS 3955393 OEM VALVE STEM SEAL – INTAKE/EXHAUST FOR RAM 5.9L/6.7L (2003–2018)
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- SKU:
- CUM3955393
- MPN:
- 3955393
- Shipping:
- Calculated at Checkout
Description
Genuine Cummins
Cummins 3955393 — Valve Stem Seal (Intake & Exhaust)
MPN: 3955393 | Also Known As: valve stem oil seal, valve seal, top-hat seal | Sold: Individually (24 required per engine)
Why This Part
- ✓ OE material & profile for proper valve stem sealing and oil control.
- ✓ Fits both intake and exhaust positions on ISB 5.9L & 6.7L.
- ✓ Direct-fit replacement to restore factory performance and reduce oil consumption.
- ✓ Sold individually so you can buy exactly what you need (24 per engine).
OE Fit Intake & Exhaust 24 Per Engine
Quick Specs
| Type | Valve stem oil seal (“top-hat” style) |
|---|---|
| OE Part # | 3955393 |
| Positions | Intake & Exhaust (interchangeable) |
| Qty Required | 24 per engine (sold individually) |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 2003–2007 | Ram 5.9L ISB (24V Common-Rail) | Ram 2500/3500 |
| 2007.5–2018 | Ram 6.7L ISB (24V Common-Rail) | Ram 2500/3500 |
Industrial/Off-Highway: Also used on various ISB/QSB engines (e.g., BS3 5.9L). Verify by ESN for non-automotive applications.
Often Paired With
- Valve spring compressor tool (24-valve)
- Valve cover gasket and grommets (year-specific)
- New valve locks/keepers if wear is present
What’s In The Box
- (1) Genuine Cummins Valve Stem Seal (3955393)
Install Tips
- Replace all 24 seals during a head refresh for consistent sealing.
- Note any OEM seal color markings during teardown and match as required.
- Use proper tools; avoid nicking valve stems or guides.
FAQ
DOES 3955393 FIT BOTH INTAKE AND EXHAUST VALVES?Yes—this OE seal fits either intake or exhaust positions on ISB 5.9L & 6.7L applications.
HOW MANY SEALS DO I NEED?Each 24-valve Cummins uses 24 valve stem seals (sold individually).
WHAT YEARS/TRUCKS DOES THIS COVER?Automotive coverage is 2003–2007 Ram 5.9L ISB and 2007.5–2018 Ram 6.7L ISB. Always verify by VIN/ESN.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 3955393 with correct material and profile for long service life.
CAN I REPLACE JUST THE LEAKING SIDE?You can, but best practice is to replace all 24 seals to ensure uniform sealing and longevity.
Additional Information
Vehicle Year: |
2003,2004,2005,2006,2007,2008,2009,2010,2011 |
Vehicle Make: |
DODGE |
ENGINE: |
5.9L,6.7L |
Part Type: |
Intake Valve Seal |
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